Machine for grinding and polishing glassware



(N M d 1.)

o e H. 0. Woon av A. J. SNOBURGBR.

MAHINB FOR GRINDING AND POLISHNG GLASSWARE.

Patented May 2-0, 1890.

Unirnn STATES PATENT. OFFICE..

IIARRXT C. WOOD AND ANDREW J. SNOBURGER, OF NEW BRIGHTON,

PENNSYLVANIA.

.MACHINE FOR GRINDING AND POLISHING GLASSWARE.

SPECIFICATION forming part of Letters Patent No. 428,195, dated May 20,1890.

Application filed July 19, 1888. Serial No. 280,405. (No model.)

To' all whom it may concern: has a bearing in the tubular casing E,which A Be it known that we, HARRY C. Woon and is secured in standard S.This tubular cas- ANDREw J. SNOBURGER, of New Brighton, in ing containstwo metallic disks E3, between in the county of Beaver and State ofPennwhich is arranged a spiral spring E2. The 5 sylvania, have inventednew and useful Irnrear end of shaft O is pointed and bears 55provenients in Machines for Grinding and against the forward disk E3,while the rear Polishing' Glassware; and we do hereby dedisk E3 isadjustable by .means of a thumbclare the following` to be a full, clear,and eX- screw E', which passes through the cap of the act description ofsaidinvention,reference betubular casing. By this means the chuckto inghad to the accompanying drawings, and shaft, with its tumbler, is forcedtoward the 6o to the letters of reference marked thereon, grinding orpolishing wheel with an adjustwhich form a part of this specification.able yielding pressure.

Our invention-relates to improvements in Upon each shaft O is secured africtionmachines for grinding and polishing the botpulley D, and a`lever L, which may be, as

i 5 toms of glass tumblers and similar articles; shown, fulcrumed uponthe bearing S', has 65 and the objects thereof are to provide means itsshort end curved toward the side of said whereby such articles may berapidly and corpulley. By operating said lever the chuckrectly ground orpolished, so that their lootshaft may be forced back against the actiontoms will be provided with a yconcavity corof spring E2, or it may beleft free to be zo responding to the arc of the grinder or polmovedtoward the grinding-wheel by the ac- 7o isher used. tion of said spring.

Our invention consists in the construction To the front end of shaft Ois secureda and combination of parts hereinafter dechuck O for thetumbler O2. Said chuck scribed, and pointed out in the claims. consistsof two parts o and o', the parto be- 25 In the drawings which accompanyand ing secured to the end of the shaft and hav- 75 form a part of thisspeciiication,and in which ing the ring o hinged to it at o2. A pinturnlike letters of reference denote similar parts, ing freely in aflange or projection of part o Figure l is a plan View of the machine.Fig. has secured to one end a lever o3, and to its 2 is an end view ofthe same. Fig. 3 is asecother end a button or lug o4, which engages 3otional view of one of the chuck-shaft slides the lug o5 on ring o whensaid ring is turned 8o or carriages and a portion of the bed. Fig. upagainst the part o, and the lever o3 is 4 is a detail view showing therear end of one turned so as to cause the lugs o4 and 05 to enof thechuck-shafts and its spring-pressed gage each other. The ring o isprovided inbearing. Fig. 5 is an enlarged detail secternally with apacking or gasket o6 of rubber 35 tional view of one of thetumbler-chucks or other elastic material. 85 open and detached from itsshaft and with a It will be observed that there are two pairs tumbler inplace. Fig. 6 is a plan view of a of sliding carriages, one pair beingshown at modilied form of slide or carriage. the right-hand end of thetable in Fig. l and At M is shown the top of a table suitably the otherpair at the left-hand end.

4o supported" by legs or otherwise, and upon the The friction-pulleys Dof each pair of 9o table are secured four ways M', and fitted tochuck-shafts receive motion from a single slide upon each of said waysis a carriage l). friction-pulley E, secured to a short counter- Eachcarriage or slide has connected to it at shaft N, which is mounted inbearings E on its inner end a cord ruiming over an idlertable M. Theextreme right and left hand 45 pulley and terminating in a weight orspring, bearings F have their caps extended upward 95 and at its outerend another cord running to form standards or bearings for the long overan idler -pulley and connected to a shaft WV. This shaft WV may besupported treadle K. Each table is provided with a directly above theshafts N; but for convenbearing S. Chuck-shaft O is free to rotate ienceof illustrationlhave shown it as slightly 5o in bearing S', 'and therear end of said shaft arranged to one side of a vertical plane thereroowith. The shafts N receive motion from shaft NV by means of belts andgrooved pulleys I and I. The main shaft R, carrying the two grinding orpolishing wheels A A, is supported in bearings on .table M, between theshafts N N, in the saine horizontal plane therewith and at a right anglethereto and to y shaft WV.

C is a pulley on shaft R, and receives power for the whole machine fromany suitable source. B is a pulley'on the same shaft, and by means of aquarter-twist belt conveys power to the pulley H on the shaft W.

The operation of our machine is as follows: The chuck being opened, asshown in Fig. 5, a tumbler is placed in the ring o', which is thenturned up against the part o and secured in that position by the lever,lug, or button, the chuck-shaft being` meanwhile held back by the leverL, and the carriage being held away from the driving friction-pulley Fby the operator keeping his foot upon treadle K. A tumbler being thussecured in the chuck, pressure is relieved from t-readle K. rFhen thelever L is turned to allow the chuck to carry the tumbler toward thewheel, and the grinding or polishing begins. When a tumbler is finished,the chuck-shaft is forced back, as heretofore described, and pressureexerted upon the treadle K, thereby bringing the carriage to theposition shown at the lower lefthand portion of Fig. l, which allowsreadyaccess for the removal of the finished tumbler and the insertion ofanother. Suitable stops may be provided to keep one or more of thecarriages out of operative position.

In Fig. 6 we have shown a carriage which, instead of being arranged toslide in a direct line toward and from shaft N, is pivoted at one end,as at c, and has at its other segmental end a curved groove and slot T,iittin g, respectively, a curved rib U and pin V, which project fromcarriage I. One object of this modied form is, that by having thecarriage move or slide in the are of a circle the tumbler is turnedoutward more conveniently for the removal from its chuck when saidpivoted carriage is moved by the treadle K.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is-

l. The combination, with a grinding' orpolishing wheel, of a rotarychuck, the shaft of which is provided with a friction-pulley andsupported in bearings in a plane parallel with the radius of said wheeland opposite the pcriphery thereof and movable in aplane across the faceof said wheel, and a power-driven counter-shaft having afriction-pulley, substantially as described.

2. The combination, with a grinding or polishing wheel, of a rotarychuck, the shaft of which is provided with a friction-pulley andsupported in bearings in a plane parallel with the radius of said wheeland opposite the pe riphery thereof and movable in a plane across theface of said wheel, a spring for exerting a pressure of l[he chucktowardthe wheel, and a power-driven counter-shaft having a friction-pulley,substantially as described.

3. rlhe combination, with a grinding or polishing wheel, of a rotarychuck, the shaft of which isl provided with a friction-pulley andsupported in bearings in a plane parallel with the radius of said wheeland opposite the periphery thereof, said bearings being carried by aslide having a path across said plane, and a power-driven counter-shafthaving a friction-pulley, substantially as described.

4. The glass-holding chuck herein shown and described, consisting of thecombination of a disk concentrically secured to the end of a rotaryshaft, a ring hinged to said disk, and means for locking the disk andring together.

5. In a glass grinding or polishing machine, the combination, with theabrading-wheel thereof, of the disk o, concentrically.secured to the endof a rotary shaft, a ring o', hinged to said disk, and means for lockingthe disk and ring together, the ring o being provided with an internalelastic packing, substantially as described.

6. In combination with a shaft carrying a plurality of grinding orpolishing wheels, two spring-pressed rotary chucks arrangeddiametrically opposite each wheel, each chuck being mounted on acarriage movable at a right angle to the plane of rotation of the wheel,friction-pulleys on said chuck-shafts, counter-shafts carryingfriction-pulleys arranged between and parallel with each pair ofchuck-shafts on either side of the wheelshaft, and means for operatingthe said counter-shafts, substantially as described.

In testimony whereof we affix our signatures in presence of twosubscribing witnesses.

HARRY C. VOOD. ANDREV .L SNOBURGER..

Witnesses: Y

JAMES RADCLIFFE, WARWICK SCOTT.

IOO

